Rack for fingers of dobby looms



Julie 3, 1930. w, E LUNDGRE-N l 1,760,909

RACK FOR FINGERS OF DOBBY LOOMS Filed Aug. 2, 1929 'A s Y F15. j y I fNVEN me W/L/AML M75/wv l A Trb/#NE V5.

Patented June 3, 193@ EA yfr WILLIAM E. LUNDennnoF WORCESTER,MASSAcnUsnT'rs'Assrenonfro OROMPTON & KNOWLES LOOM Wonne, or WORCESTER,MASSACHUSETTS, A CORPORATION OF.

' MASSACHUSETTS :aAoKron rrnenns or noi-sermons t K Appnctin ined AugustYla, 1929.- Serial Nolfssaon. Y

This invention relates to improvements in the racks for dobby fingersand it is the 'gen- Silencer which effects more quietv eral objectof theinvention'rto provide an improved rack or separating device which shallbe easily manufactured, comparatively silent in operation,and-efficiently held in position Vwith respect'to the dobby frame.

Loom dobbies employ in their. construction a plurality of fiat fingerswhich are movable in vertical planes under the action of the patternchain. 'Thesev `fingers control hooksl which in turn are operativelyconnected tol the several harnesses of the loom, androppjo- Y sitelyreciprocating lifted knives cooperate with such hooks as are down tolift the corresponding harnesses. AThe pattern chain" usually employswooden bars with upstanding pegs, and it is necessary to provide someform of guide to hold the'fingers in proper alignment with the pegs,l"It is, an important object of myY presentA invention to provide anon-metallic strip of -material which has secured thereto a plurality ofspaced parallel wires or dents which denne [a rack'to .guide thefingers, the bar being. held in position by extensions which, projectlfrom cerf tain of the wires or dents.

' It is a furtherobject of my invention to*y forml the rack of aplurality of wires certain of which are somewhat larger, eitherindiam-Y' eter or length than the othervwir'es, the larger wires being 'driveninto a supporting structure'and acting to hold the bar and Vtheremainingsmaller Wires in' proper position.` I

find that inmaking the holding wires some-- expensive than wood and alsointroducing aoperation ofthe dobby.

will appearas the description proceeds, my invention resides in thecombination and arent lnvention, f

YF ig. 2 is a side elevation taken inthe di- .controls the rising andffalling ofthe fingers, y21 and 24 and through connections described setforth in the claims. l

f In the accompanying drawings, wherein two .forms of the inventions areshown, Fig. 1V is a side elevation of a dobby incorporating thepreferredform-of presrection of arrow 2,.Fig. 1,1` p p y F I g. 3 is anenlarged vertical section taken on line 3 3 of Fig. 2, f l

rection of arrow 4,y Fig. 2 and its support, andV showingthe rack Fig. 51s a vlew similar toa portion of Fig. 'l

`2but showingv the modified form of construction wherein theholding'pins project above the otherfpins. v l i 1 Referring to Fig. 1,I have shown a frame F5 witha rocker Varmy 10 pivoted as at 11 Fig. 4isa, top plan viewtaken in .thedi-y and having connection with 'adepending drivf ing rod 121gwhich mayT 'be raisedevery alternate pick ofthe loomv and -depressedon .interveningpicks. `Upper and lower liftingknives 13`and 14 are attac'hed'bymeanstof connectors 15 to the upper andlowerarms 16 and17, respectively, of the rocker armk i 10.` These=lnivescooperate with hooks 18Y andf19,"respectively, which are attachedV bymeans ofla, jack indicated herein at 20 to the ofthe type designated at21, while vthe intervening fingers vwill beof thev othertype. A patterntsurface 25 on `a pattern cylinder v 26 determine the position ofthehooks relatively i to the'knives. The matter thus fary described visof commonlconstruction andfforms no part i ofniy present invention,being made and I operating in the usual and well-known man-. Wlth theseand other objects in view whichv guide for the right hand ends of thelingers 2l and 24 as viewed in Fig. l. rIhis guide comprises a support30 formed preferably of metal and has upturned wings 3l and 32 which arelocated, respectively, atthe right and left hand ends of the support.Bolts 33 secure the wings of the framie of the dobby I?.

Extending between the wings 3l and 32 and lying on a horizontal body 34of the support isa bar 35 made preferably of wood. This .bar may beproportioned as set forth in lFiga?) and substantially Vfills the spacebetween the wings 3l and 32. rIhe upper surface 36 of the wooden bar hasextending upwardly therefrom a plurality of relatively Small parallelspaced wires or rackdents 37 between which extend the ends of thefingers.

j fis 'shown particularly in Fig. 2 the wires 37 preferably. extend onlypartway into the wooden bar 35.

In order to hold the bar to the support I provide other wires 38 whichare in alignment with the smaller wires asset forth in Fig. i but may beof larger diameter. These larger wires extend entirely through the bar35 and into the body 3a of the support, and are held frictionally inthesupport, being driven into position. rI he larger wires 33 cooperatewith the adjacent smaller bars to space the lingers lying on either sidethereof.

I find that the larger diameter of the wires 38 facilitates theirremoval. When it is desirable to replace bar 35 any suitable tools,vsuch as for instance apair of pliers, maybe employed to grip oppositesides of the wires. Because of the `fact that the latter arelargerthanthe wires 37 the smaller wires will not bepulled out of position.

I do not wish to be limited to the use of the larger wire, however, as Imay employ retaining wires 39 which extend above the shorter wires 40 asshown in a modification set forth' in Fig. 5. So far as this feature ofmy invention is concerned it is sufcient if the retaining wires 38 or 39extend beyond the Zone occupied by the wires 37 or l0 so as to present aportion which may beengaged by a moving tool without disturbing thesetting of the other wires.

. into a rigid, preferably metallic part of the From the foregoing itwill be seen thatI have provided an improved form of guide and dobbyfinger wherein a non-metallic bar,

preferably though not necessarily wood, has Y inserted therein fingerspacing wires certain of which extend entirely through the bar and dobbystructure. Furthermore, it will be notedthat the lingers which hold thebar in position are so proportioned as to extend beyond the zoneoccupied by the remaining fingers, thereby permitting removal of said bemadetherein by those skilled in the art without departing from thespirit and scope of the invention and I do not wish to be limited to thedetails herein disclosed, but what I claim is 1. In a loom dobby havingngers, a support under the lingers, a wooden bar on the support, andwires projecting upwardly from the bar to space the lingers, certain ofsaid wires extending through the ybar and into the support to hold saidbar in position onthe support. y

2. vIn a loom dobby having fingers, a supporting member in fixedposition relatively to the dobby, a non-metallic bar extending under thefingers, wires extending upwardly from the bar to space the fingers,certain of said wires extending through the bar and into the member tohold the bar'in position on the member. Y

3. In a loom dobby having ngers, a supporting member fixed with respecttothe dobby, a bar separate from but'deriving support from the member, aplurality of wires carried by and projecting from said bar to space thewires, certain of said wires extending through the bar and into themember to hold the bar in position on the member.

il. In a loom dobby having ngcrs, a supporting member fixed with respectto the dobby, a bar separate from but deriving support from the member,a plurality of wires carried by and projecting from said bar to spacethe wires, certain of said wires extending through the bar and into themember to hold the bar in positionon the member, said wires which`extend linto Vthe member, being larger than the other wires tofacilitate removal thereof.

5. In a loom dobby having lingers, a sup-v porting member xed withrespect to the dobby, a bar separate from but deriving support from themember, a plurality of wires carried by and projecting from saidbar tospace the wires, certain o-f said wires extending through the bar andinto the member to hold the bar in position on the member, said wireswhich extend into the member projecting beyond the Zone occupied by theother wires to facilitate removal thereof. i

In testimony whereof I have hereunto affixed my signature. v

WILLIAM E., LUNDGREN.

